Display panel, display panel preparation method, and display device

Abstract

The present application discloses a display panel, a display panel preparation method, and a display device. The display panel comprises: a substrate; a touch layer arranged on one side of the substrate, wherein the touch layer comprises a touch electrode; a circuit board; and a touch wiring comprising first touch wiring sections and second touch wiring sections which are located at different layers, wherein the first touch wiring sections are electrically connected to the touch electrode, the second touch wiring sections are electrically connected to the circuit board, and each first touch wiring section is electrically connected to a same second touch wiring section by means of at least two lap-joint parts. The number of the lap-joint parts is set to be at least two, so as to realize redundant design, thereby ensuring that when problems, such as deviations, occur between each first touch wiring section and the corresponding second touch wiring section, the first touch wiring section and the second touch wiring section can be connected by means of at least one lap-joint part; at least one lap-joint part is ensured to work normally; process requirements are lowered; and the production yield and performance of display panels are improved.

Description

Display panel, display panel manufacturing method, and display device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202410091649.2, filed on January 23, 2024, entitled “Display Panel, Display Panel Preparation Method and Display Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of display technology, and in particular relates to a display panel, a method for manufacturing a display panel, and a display device. Background Art

[0004] Organic Light Emitting Diode (OLED) and flat-panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, power saving, thin body, and wide range of applications, becoming the mainstream display device.

[0005] However, the performance of current OLED display products needs to be improved.

[0006] Therefore, there is an urgent need for a new display panel, a method for manufacturing a display panel, and a display device. Summary of the Invention

[0007] The embodiments of the present application provide a display panel, a method for preparing a display panel, and a display device. By setting the number of overlapping portions to at least two, a redundant design is achieved. This ensures that when problems such as misalignment occur between the first touch trace segment and the second touch trace segment, the first touch trace segment and the second touch trace segment can be connected by at least one overlapping portion, ensuring that at least one overlapping portion can operate normally, reducing process requirements, and improving the production yield and performance of the display panel.

[0008] In a first aspect, an embodiment of the present application provides a display panel, comprising: a substrate; a touch layer, disposed on one side of the substrate, the touch layer comprising touch electrodes; a circuit board, the circuit board and the touch layer being adjacently arranged along a direction parallel to the plane of the substrate; a touch trace, the touch trace comprising a first touch trace segment and a second touch trace segment of different layers, the first touch trace segment being electrically connected to the touch electrodes; the second touch trace segment being electrically connected to the circuit board, the first touch trace segment being electrically connected to the second touch trace segment of the same segment through at least two overlapping portions.

[0009] In a second aspect, an embodiment of the present application provides a display panel, comprising: a substrate; a touch layer, arranged on one side of the substrate, the touch layer comprising touch electrodes; a circuit board, the circuit board and the touch layer being adjacently arranged along a direction parallel to the plane of the substrate; a touch trace, the touch trace comprising a first touch trace segment and a second touch trace segment of different layers, the first touch trace segment being electrically connected to the touch electrode, and the second touch trace segment being electrically connected to the circuit board; a overlapping unit, the overlapping unit comprising a normal overlapping portion and a redundant overlapping portion, the first touch trace segment being electrically connected to the second touch trace segment via the normal overlapping portion and / or the redundant overlapping portion.

[0010] In a third aspect, an embodiment of the present application provides a method for preparing a display panel, comprising the following steps: providing a substrate; forming a touch layer and touch traces on one side of the substrate, the touch layer comprising touch electrodes, the touch traces comprising first touch trace segments and second touch trace segments of different layers, the first touch trace segments being electrically connected to the touch electrodes, the first touch trace segments being electrically connected to the same section of the second touch trace segments through at least two overlapping portions; providing a circuit board, the circuit board and the touch layer being adjacently arranged in a direction parallel to the plane of the substrate, the second touch trace segments being electrically connected to the circuit board.

[0011] In a fourth aspect, an embodiment of the present application provides a display device, comprising the display panel in any of the above embodiments.

[0012] Compared with the prior art, the display panel provided by the embodiment of the present invention includes a substrate, a touch layer, a circuit board and a touch trace. Since the first touch trace segment and the second touch trace segment are located in different layers, in order to connect the two, an overlapping portion is provided to achieve the connection between the first touch trace segment and the second touch trace segment. In this embodiment, the first touch trace segment is electrically connected to the same second touch trace segment through at least two overlapping portions. By setting the number of overlapping portions to at least two, a redundant design is achieved to ensure that when problems such as misalignment occur between the first touch trace segment and the second touch trace segment, the first touch trace segment and the second touch trace segment can be connected through at least one overlapping portion, ensuring that at least one overlapping portion can work normally, reducing process requirements, and improving the production yield and performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG1 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0014] FIG2 is an enlarged structural diagram of area A in FIG1 provided by an embodiment;

[0015] FIG3 is a schematic diagram of the cross-sectional structure of area BB in FIG2 ;

[0016] FIG4 is a schematic structural diagram of an overlap portion provided by an embodiment of the present invention;

[0017] FIG5 is a schematic cross-sectional view of the structure at area CC in FIG4 provided by an embodiment;

[0018] FIG6 is a schematic cross-sectional view of the area CC in FIG4 provided by another embodiment;

[0019] FIG7 is a schematic cross-sectional view of the area CC in FIG4 provided by yet another embodiment;

[0020] FIG8 is a schematic cross-sectional view of the area CC in FIG4 provided by yet another embodiment;

[0021] FIG9 is a schematic cross-sectional view of the area CC in FIG4 provided by yet another embodiment;

[0022] FIG10 is an enlarged structural diagram of area A in FIG1 provided by another embodiment;

[0023] FIG11 is a schematic diagram of an enlarged structure of area A in FIG1 provided by yet another embodiment;

[0024] FIG12 is a schematic structural diagram of a lap joint provided by another embodiment of the present invention;

[0025] FIG13 is a schematic structural diagram of a lap joint provided by yet another embodiment of the present invention;

[0026] FIG14 is a flow chart of a method for manufacturing a display panel according to an embodiment of the present invention;

[0027] FIG15 is a schematic cross-sectional view of a structure obtained in step S110 in a method for manufacturing a display panel according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0029] It will be apparent to those skilled in the art that various modifications and variations can be made in this application without departing from the spirit or scope of this application. Therefore, this application is intended to cover modifications and variations of this application that fall within the scope of the corresponding claims (technical solutions claimed for protection) and their equivalents. It should be noted that the embodiments provided in the examples of this application can be combined with each other without contradiction.

[0030] Embodiments of the present application provide a display panel, a method for manufacturing a display panel, and a display device. Hereinafter, embodiments of the display panel, the method for manufacturing a display panel, and the display device will be described with reference to FIG. 1 to FIG. 15 .

[0031] Referring to Figures 1 to 3, an embodiment of the present application provides a display panel, which includes: a substrate 1; a touch layer 2, which is provided on one side of the substrate 1, and the touch layer 2 includes touch electrodes 20; a circuit board 3, and the circuit board 3 and the touch layer 2 are adjacently arranged along a direction parallel to the plane of the substrate 1; a touch trace 4, which includes a first touch trace segment 41 and a second touch trace segment 42 of different layers, and the first touch trace segment 41 is electrically connected to the touch electrode 20; the second touch trace segment 42 is electrically connected to the circuit board 3, and the first touch trace segment 41 is electrically connected to the same section of the second touch trace segment 42 through at least two overlapping portions L.

[0032] The display panel provided in an embodiment of the present invention includes a substrate 1, a touch layer 2, a circuit board 3, and a touch trace 4. Because a first touch trace segment 41 and a second touch trace segment 42 are located on different layers, an overlapping portion L is provided to connect the first touch trace segment 41 and the second touch trace segment 42. In this embodiment, the first touch trace segment 41 is electrically connected to the same second touch trace segment 42 via at least two overlapping portions L. By setting the number of overlapping portions L to at least two, a redundant design is implemented. This ensures that if problems such as misalignment occur between the first touch trace segment 41 and the second touch trace segment 42, the first touch trace segment 41 and the second touch trace segment 42 can be connected via at least one overlapping portion L, ensuring that at least one overlapping portion L can function properly, reducing process requirements and improving the production yield and performance of the display panel.

[0033] In this embodiment, the first touch trace segment 41 is electrically connected to the touch electrode 20, and the second touch trace segment 42 is electrically connected to the circuit board 3. After the first touch trace segment 41 and the second touch trace segment 42 are connected by the overlapping portion L, signals can be transmitted between the touch electrode 20 and the circuit board 3 via the circuit formed by the first touch trace segment 41, the second touch trace segment 42, and the overlapping portion L, thereby achieving touch detection.

[0034] In the prior art, the first touch trace segment 41 and the second touch trace segment 42 are connected via an overlap portion L. During display panel manufacturing, inaccurate alignment due to process deviation during design or screen expansion and contraction can cause the overlap portion L to be incorrectly etched, resulting in a failure to properly connect the first touch trace segment 41 and the second touch trace segment 42, affecting the production yield and performance of the display panel.

[0035] To solve the above problems, in an embodiment of the present invention, the first touch trace segment 41 is electrically connected to the same second touch trace segment 42 through at least two overlapping portions L, so as to achieve a redundant design by increasing the number of overlapping portions L, thereby ensuring that at least one overlapping portion L will not be etched, enabling normal processing, and improving the production yield and performance of the display panel.

[0036] The substrate 1 can be a hard substrate, such as a glass substrate; or a flexible substrate, and its material can be polyimide, polystyrene, polyethylene terephthalate, polyparaxylene, polyethersulfone or polyethylene naphthalate. The substrate 1 is mainly used to support the devices arranged thereon.

[0037] Optionally, the touch layer 2 can be made of ITO (Indium Tin Oxide) material. ITO has high light transmittance and can effectively improve the light transmittance of the display panel to ensure the display effect. Of course, the touch layer 2 can also be made of other materials, such as molybdenum, titanium, aluminum, silver and other metal materials.

[0038] Optionally, the first touch trace segment 41 and the second touch trace segment 42 can be made of the same material to facilitate fabrication. Alternatively, the first touch trace segment 41 and the second touch trace segment 42 can be made of different materials, depending on the material of the film layer containing the first touch trace segment 41 and the second touch trace segment 42, without any special limitation.

[0039] Optionally, the first touch trace segment 41 and the second touch trace segment 42 may be metal wires. Metal wires have low impedance and can improve the performance of the display panel. Optionally, the material of the first touch trace segment 41 and the second touch trace segment 42 includes at least one of molybdenum, titanium, and aluminum. For example, the material of the first touch trace segment 41 and the second touch trace segment 42 may be molybdenum alone or a titanium-aluminum-titanium composite material, without particular limitation.

[0040] Please refer to Figure 3. In some optional embodiments, the display panel also includes a stacked substrate 1, an array layer 5, a display function layer 6, and an encapsulation layer 7. The touch layer 2 and the first touch trace segment 41 are both arranged on the side of the encapsulation layer 7 facing away from the substrate 1; the array layer 5 includes at least two conductive layers M, and the second touch trace segment 42 and at least one layer of the conductive layer M are arranged on the same layer.

[0041] It should be noted that since the touch layer 2 is disposed on the side of the encapsulation layer 7 facing away from the substrate 1, to facilitate connection with the touch electrode 20, the first touch trace segment 41 is also disposed on the side of the encapsulation layer 7 facing away from the substrate 1, while the second touch trace segment 42 is located within the array layer 5 below the encapsulation layer 7. If desired, the second touch trace segment 42 and at least one layer of the conductive layer M can be disposed on the same layer. That is, the second touch trace segment 42 and the conductive layer M on the same layer can be formed together through the same process and made of the same material, thereby reducing production costs, simplifying the production process, and facilitating manufacturing.

[0042] Optionally, the array layer 5 may include a drive circuit, which includes a transistor and a storage capacitor R. The transistor includes an active layer Z, a gate G, a source S, and a drain D. For example, the array layer 5 includes a first conductive layer M1, a second conductive layer M2, and a third conductive layer M3 arranged in a direction away from the substrate 1. An insulating layer J is provided between adjacent conductive layers M. Exemplarily, the storage capacitor R includes a first plate R1 and a second plate R2. As an example, the gate G and the first plate R1 can be located in the first conductive layer M1, the second plate R2 can be located in the second conductive layer M2, and the source S and drain D can be located in the third conductive layer M3.

[0043] Referring to Figures 4 and 5 , the second touch trace segments 42 are disposed in the same layer as at least one of the first conductive layer M1, the second conductive layer M2, and the third conductive layer M3. Specifically, the second touch trace segments 42 may be disposed in the same layer as one of the first conductive layer M1, the second conductive layer M2, and the third conductive layer M3. Alternatively, some of the second touch trace segments 42 may be disposed in the same layer as one of the first conductive layer M1, the second conductive layer M2, and the third conductive layer M3, while other parts of the second touch trace segments 42 may be disposed in the same layer as another layer of the first conductive layer M1, the second conductive layer M2, and the third conductive layer M3. The present invention is not particularly limited to this.

[0044] Optionally, along a direction away from the substrate 1 , the display function layer 6 includes a first electrode layer 61 , a light-emitting layer 62 and a second electrode layer 63 .

[0045] The material of the first electrode layer 61 is generally a material with a high work function to improve hole injection efficiency, and can be gold (Au), platinum (Pt), titanium (Ti), silver (Ag), indium tin oxide (ITO), zinc tin oxide (IZO), or a transparent conductive polymer (such as polyaniline). For example, the first electrode layer 61 can be made of an ITO-Ag-ITO composite material, without particular limitation.

[0046] The material of the second electrode layer 63 can be one of the metal materials such as silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca) or indium (In), or it can be an alloy of the aforementioned metal materials, such as magnesium-silver alloy (Mg / Ag) and lithium-aluminum alloy (Li / Al). This embodiment does not impose any restrictions on this.

[0047] The light-emitting layer 62 includes one or more of an electron injection layer, an electron transport layer, a light-emitting material layer, a hole blocking layer, an electron blocking layer, a hole transport layer, and a hole injection layer. The type of light-emitting layer 62 can be selected without particular limitation. The electron injection layer, electron transport layer, and hole blocking layer can be disposed between the second electrode layer 63 and the light-emitting layer 62. The electron blocking layer, hole transport layer, and hole injection layer can be disposed between the first electrode layer 61 and the light-emitting material layer.

[0048] Optionally, the encapsulation layer 7 includes a first encapsulation layer 71 , and the material of the first encapsulation layer 71 includes an inorganic material.

[0049] It is understandable that the encapsulation layer 7 is used to encapsulate and protect the display function layer 6 , and the inorganic material may specifically be silicon nitride, silicon oxide, silicon oxynitride and the like, and may specifically be formed using a CVD (Chemical Vapor Deposition) process.

[0050] Optionally, the encapsulation layer 7 further includes a second encapsulation layer 72 located on the side of the first encapsulation layer 71 facing away from the substrate 1. The material of the second encapsulation layer 72 includes an organic material. The organic material can be made of resin or polymer organic material, and can be formed using an IJP (Inkjet Printing) process.

[0051] Optionally, the encapsulation layer 7 also includes a third encapsulation layer 73 located on the side of the second encapsulation layer 72 facing away from the substrate 1. The material of the third encapsulation layer 73 includes an inorganic material. Continuing to add an inorganic encapsulation layer 7 outside the organic encapsulation layer 7 can further improve the encapsulation effect of the encapsulation layer 7. In this embodiment, the material of the third encapsulation layer 73 can be the same as or different from the material of the first encapsulation layer 71, and there is no special limitation.

[0052] Optionally, the material of the first encapsulation layer 71 and the material of the third encapsulation layer 73 are the same, so that the first encapsulation layer 71 and the third encapsulation layer 73 can be prepared using the same equipment, which can simplify the preparation process of the display panel.

[0053] Considering that the overlapping portion L usually adopts the form of a via K and a conductive portion C is arranged in the via K to achieve the connection between the first touch trace segment 41 and the second touch trace segment 42, if the distance between the first touch trace segment 41 and the second touch trace segment 42 in the direction perpendicular to the plane of the substrate 1 is large, and there are multiple insulating layers J between the two, the overlapping portion L needs to be provided with multiple connected vias K to achieve the connection between the first touch trace segment 41 and the second touch trace segment 42. However, due to process reasons, a certain step or slope will be formed between the vias K, which may cause the conductive portion C in the overlapping portion L to break.

[0054] Please refer to Figures 6 to 8. In order to avoid the above-mentioned problems, the display panel also includes a transition connection layer H arranged between the first touch trace segment 41 and the second touch trace segment 42. The first touch trace segment 41 is electrically connected to the transition connection layer H through the overlapping portion L, and the transition connection layer H is electrically connected to the second touch trace segment 42.

[0055] In this embodiment, the first touch trace segment 41 is first electrically connected to the transition connection layer H through the overlapping portion L, and then the transition connection layer H is electrically connected to the second touch trace segment 42 through a via K or the like. The transition connection layer H can be provided on the same layer as a conductive layer M in the array layer 5, as long as the transition connection layer H is provided above the second touch trace segment 42.

[0056] Optionally, the transition connection layer H and the third conductive layer M3 are arranged on the same layer, as shown in Figures 6 to 8, the first touch routing segment 41 is electrically connected to the transition connection layer H through at least one overlapping portion L, the second touch routing segment 42 is arranged on the same layer as any one of the first conductive layer M1 and the second conductive layer M2, and the transition connection layer H is electrically connected to the second touch routing segment 42.

[0057] It is understood that the third conductive layer M3 is disposed above the first conductive layer M1 and the second conductive layer M2. Therefore, the transition connection layer H can be disposed on the same layer as the third conductive layer M3 so that the transition connection layer H connects the lap portion L and the second touch trace segment 42 respectively.

[0058] It should be noted that the overlapping portions L connected to the same first touch trace segment 41 can be connected to the same transition connection layer H, as shown in Figure 7. Alternatively, at least one of the overlapping portions L connected to the first touch trace segment 41 can be connected to a transition connection layer H, while the other overlapping portions L can be directly connected to the second touch trace segment 42. That is, among the overlapping portions L connected to the first touch trace segment 41, some overlapping portions L can be connected to the second touch trace segment 42 via the transition connection layer H, while some overlapping portions L can be directly connected to the second touch trace segment 42, as shown in Figure 8.

[0059] In this embodiment, the overlapping portion L includes a via K and a conductive portion C located in the via K. The conductive portion C can be made of the same material as the first touch trace segment 41 or the second touch trace segment 42. Considering the preparation process, the conductive portion C can be made of the same material as the first touch trace segment 41.

[0060] Optionally, according to actual needs, the array layer 5 can also be provided with more conductive layers M. For example, the array layer 5 also includes a fourth conductive layer M4 arranged on the side of the third conductive layer M3 facing away from the substrate 1, and the transition connection layer H or the second touch trace segment 42 can be arranged on the same layer as the fourth conductive layer M4.

[0061] Referring to FIG. 9 , in some optional embodiments, two adjacent second touch trace segments 42 are disposed on the same layer as different conductive layers M along a first direction X, and the first direction X is parallel to the plane of the substrate 1 .

[0062] It is understood that by arranging two adjacent second touch trace segments 42 in different layers, the space for arranging the second touch trace segments 42 can be increased. Depending on actual needs, the line width of the second touch trace segments 42 can also be set larger to ensure that the impedance of the touch trace 4 of the display panel meets the requirements.

[0063] For example, one of the two adjacent second touch trace segments 42 can be provided on the same layer as the first conductive layer M1, and the other can be provided on the same layer as the second conductive layer M2. Of course, the second touch trace segment 42 can also be provided on the same layer as the third conductive layer M3 or other conductive layers M, without any special limitation.

[0064] Referring to FIG. 9 , optionally, two second touch trace segments 42 spaced apart by a second touch trace segment 42 along the first direction X are arranged in the same layer, i.e., two second-adjacent second touch trace segments 42 are arranged in the same layer, to improve the regularity of the arrangement of the second touch trace segments 42 and facilitate manufacturing. For example, along the first direction X, the second touch trace segments 42 arranged in the same layer as the first conductive layer M1, the second touch trace segments 42 arranged in the same layer as the second conductive layer M2, and the second touch trace segments 42 arranged in the same layer as the first conductive layer M1 are arranged alternately.

[0065] Please refer to Figure 3. In some optional embodiments, the touch layer 2 includes a first touch conductive layer 21 and a second touch conductive layer 22 stacked in a direction away from the substrate 1. The touch electrode 20 includes a first touch electrode block N1 and a second touch electrode block N2 that are arranged in the same layer and insulated from each other. The touch electrode 20 is arranged in the same layer as any one of the first touch conductive layer 21 and the second touch conductive layer 22. The touch trace 4 includes a first touch signal line W1 electrically connected to the first touch electrode block N1 and a second touch signal line W2 electrically connected to the second touch electrode block N2. The touch trace 4 is arranged in the same layer as at least one of the first touch conductive layer 21 and the second touch conductive layer 22.

[0066] It can be understood that in this embodiment, the display panel adopts a mutual capacitance touch structure, one of the first touch electrode block N1 and the second touch electrode block N2 is a touch drive electrode, and the other is a touch sensing electrode, and the first touch signal line W1 and the second touch signal line W2 are used to transmit the voltage signals of the first touch electrode block N1 and the second touch electrode block N2, respectively.

[0067] In this embodiment, the first touch signal line W1 and the second touch signal line W2 can be provided on the same layer. For example, the first touch signal line W1 and the second touch signal line W2 can be provided on the first touch conductive layer 21 or the second touch conductive layer 22. Alternatively, the first touch signal line W1 and the second touch signal line W2 can be located on different layers to increase the space for providing the first touch signal line W1 and the second touch signal line W2 and facilitate wiring.

[0068] Optionally, when the first touch signal line W1 and the second touch signal line W2 are arranged in different layers, the first touch signal line W1 and the second touch signal line W2 can be made to at least partially overlap in a direction perpendicular to the display panel, that is, the space occupied by the first touch signal line W1 and the second touch signal line W2 is reduced to reduce the border width of the display panel.

[0069] Optionally, the first touch conductive layer 21 includes a bridge portion Q, which is used to electrically connect adjacent first touch electrode blocks N1. The touch electrodes 20 and the second touch conductive layer 22 are disposed in the same layer. Since the first touch electrode blocks N1 and the second touch electrode blocks N2 are typically disposed in the same layer, to prevent mutual interference between them, in this embodiment, a bridge portion Q can be provided in the first touch conductive layer 21 to connect adjacent first touch electrode blocks N1, without requiring the connection of adjacent first touch electrode blocks N1 within the second touch conductive layer 22 to avoid affecting the connection of adjacent second touch electrode blocks N2. Optionally, the first touch electrode blocks N1 and the second touch electrode blocks N2 are arranged in an array along the first direction X and the second direction Y. The bridge portion Q can connect adjacent first touch electrode blocks N1 in the same column or adjacent first touch electrode blocks N1 in the same row.

[0070] Please refer to Figure 2. In some optional embodiments, the display panel includes a display area AA and a non-display area NA. The non-display area NA includes overlapping areas TA arranged on both sides of the circuit board 3 along a first direction X. The first direction X is parallel to the direction of the plane where the substrate 1 is located; the overlapping portion L is located in the overlapping area TA.

[0071] It should be noted that, compared to the prior art arrangement in which the overlapping portion L is located within the area on the side of the circuit board 3 facing the touch layer 2, in this embodiment, the overlapping portion L is located in the overlapping area TA provided on both sides of the circuit board 3. This provides more space for the overlapping portion L, the first touch trace segment 41, and the second touch trace segment 42, effectively reducing the bezel width of the display panel and achieving a narrow bezel. Furthermore, the larger space for the overlapping portion L facilitates the preparation and arrangement of at least two overlapping portions L to connect the first touch trace segment 41 and the second touch trace segment 42, reducing the process difficulty.

[0072] Please refer to Figure 2. In some optional embodiments, the display panel further includes a signal line 8, which is electrically connected to the circuit board 3. In a direction perpendicular to the plane of the substrate 1, the signal line 8 does not overlap with at least the first touch trace segment 41.

[0073] It should be noted that the signal line 8 is usually arranged in the area on the side of the circuit board 3 facing the touch layer 2 to connect to the circuit board 3. In this embodiment, the overlapping portion L is located in the overlapping area TA provided on both sides of the circuit board 3 to avoid large-area overlap between the first touch trace segment 41, the second touch trace segment 42 and the signal line 8, thereby avoiding the problem of signal interference between the touch signal line and the signal line 8.

[0074] Optionally, in a direction away from the substrate 1 , the display function layer 6 includes a first electrode layer 61 , a light-emitting layer 62 and a second electrode layer 63 , and the signal line 8 includes a voltage signal line electrically connected to the second electrode layer 63 .

[0075] It should be noted that the voltage signal line electrically connected to the second electrode layer 63 typically needs to transmit a negative voltage signal to the second electrode layer 63, while the first touch trace segment 41 and the second touch trace segment 42 need to transmit a positive voltage signal. If the first touch trace segment 41, the second touch trace segment 42 overlap with the voltage signal line, a potential difference will occur between the positive voltage of the first touch trace segment 41 and the second touch trace segment 42 and the negative voltage of the voltage signal line, thereby generating an electric field that affects the reliability of the display panel. Therefore, in this embodiment, by locating the overlapping portion L in the overlapping area TA provided on both sides of the circuit board 3, at least the first touch trace segment 41 and the signal line 8 are allowed to avoid each other, thereby preventing the signal line 8 from overlapping the first touch trace segment 41 and the first touch trace segment 41, thereby preventing the generation of an electric field between the two, and improving the reliability of the display panel.

[0076] Referring to Figure 10, in some optional embodiments, the second touch trace segment 42 includes a first portion 421 extending along the second direction Y, the first portion 421 is electrically connected to the first touch trace segment 41 through the overlapping portion L, and the second direction Y and the first direction X intersect; the first portion 421 is arranged on the side of the overlapping portion L facing the first touch trace segment 41.

[0077] It should be noted that the first portion 421 is disposed on the side of the overlapping portion L facing the first touch trace segment 41, that is, on the side of the overlapping portion L away from the edge of the display panel, that is, away from the edge of the lower frame of the display panel in Figure 1. This prevents the first portion 421 from being too close to the lower edge of the display panel and causing static electricity to damage the first portion 421, thereby improving the reliability of the display panel. In this embodiment, the first direction X can be the extension direction of the lower edge of the display panel, and the second direction Y can be perpendicular to the first direction X.

[0078] Of course, considering the influence of factors such as actual process difficulty, the first part 421 can also be arranged on the side of the overlapping part L away from the first touch trace segment 41, that is, the first part 421 is arranged on the side of the overlapping part L close to the edge of the display panel, without special limitation.

[0079] Please refer to Figures 11 and 12. An embodiment of the present application provides a display panel, which includes: a substrate 1; a touch layer 2, which is arranged on one side of the substrate 1, and the touch layer 2 includes touch electrodes 20; a circuit board 3, and the circuit board 3 and the touch layer 2 are adjacently arranged along a direction parallel to the plane where the substrate 1 is located; a touch trace 4, the touch trace 4 includes a first touch trace segment 41 and a second touch trace segment 42 of different layers, the first touch trace segment 41 is electrically connected to the touch electrode 20, and the second touch trace segment 42 is electrically connected to the circuit board 3; a bonding unit I, the bonding unit I includes a normal bonding portion I1 and a redundant bonding portion I2, and the first touch trace segment 41 is electrically connected to the second touch trace segment 42 via the normal bonding portion I1 and / or the redundant bonding portion I2.

[0080] The display panel provided by the embodiment of the present invention includes a substrate 1, a touch layer 2, a circuit board 3, a touch trace 4 and a bonding unit I. Since the first touch trace segment 41 and the second touch trace segment 42 are located in different layers, in order to connect the two, a bonding unit I is provided to achieve the connection between the first touch trace segment 41 and the second touch trace segment 42. In this embodiment, the bonding unit I includes a normal bonding portion I1 and a redundant bonding portion I2. The first touch trace segment 41 is electrically connected to the second touch trace segment 42 through the normal bonding portion I1 and / or the redundant bonding portion I2. That is, when problems such as misalignment occur between the first touch trace segment 41 and the second touch trace segment 42, the first touch trace segment 41 and the second touch trace segment 42 can also be connected through the additional redundant bonding portion I2, ensuring that at least one of the normal bonding portion I1 and the redundant bonding portion I2 in the bonding unit I can operate normally, thereby reducing process requirements and improving the production yield and performance of the display panel.

[0081] In some optional embodiments, the cross-sectional width of the normal overlap portion I1 is not less than the cross-sectional width of the redundant overlap portion I2, that is, the cross-sectional width of the normal overlap portion I1 is greater than or equal to the cross-sectional width of the redundant overlap portion I2, so as to ensure that there is sufficient contact area between the normal overlap portion I1 and the first touch trace segment 41 and the second touch trace segment 42 to ensure the conduction effect.

[0082] Optionally, the cross-sectional width of the normal overlapping portion I1 is the same as the cross-sectional width of the redundant overlapping portion I2, so that the normal overlapping portion I1 and the redundant overlapping portion I2 can be prepared together, reducing the difficulty of the process.

[0083] Optionally, the connecting unit I includes at least one normal connecting portion I1 and multiple redundant connecting portions I2, where the number of redundant connecting portions I2 is greater than or equal to the number of normal connecting portions I1. In this embodiment, the connecting unit I may include one normal connecting portion I1 and one redundant connecting portion I2, or may include one normal connecting portion I1 and at least two redundant connecting portions I2. For example, as shown in FIG13 , the connecting unit I includes one normal connecting portion I1 and two redundant connecting portions I2, ensuring that at least one redundant connecting portion I2 exists to connect the first touch trace segment 41 and the second touch trace segment 42.

[0084] Optionally, the normal overlap portion I1 and the redundant overlap portion I2 are arranged at equal intervals to avoid mutual interference between the normal overlap portion I1 and the redundant overlap portion I2, improve the regularity of the arrangement of the normal overlap portion I1 and the redundant overlap portion I2, and facilitate preparation.

[0085] In some optional embodiments, the display panel also includes a stacked substrate 1, an array layer 5, a display function layer 6, and an encapsulation layer 7, and the touch layer 2 and the first touch trace segment 41 are both arranged on the side of the encapsulation layer 7 facing away from the substrate 1; the array layer 5 includes at least two conductive layers M, and the second touch trace segment 42 and at least one layer of the conductive layer M are arranged on the same layer.

[0086] It should be noted that since the touch layer 2 is provided on the side of the encapsulation layer 7 facing away from the substrate 1, to facilitate connection with the touch electrode 20, the first touch trace segment 41 is also provided on the side of the encapsulation layer 7 facing away from the substrate 1, while the second touch trace segment 42 is located in the array layer 5 below the encapsulation layer 7. According to actual needs, the second touch trace segment 42 and at least one layer of the conductive layer M can be provided on the same layer, that is, the second touch trace segment 42 and the conductive layer M on the same layer can be formed together through the same process and made of the same material, so as to reduce production costs, simplify the production process, and facilitate preparation.

[0087] Optionally, the array layer 5 may include a driving circuit, which includes a transistor and a storage capacitor R. The transistor includes an active layer Z, a gate G, a source S, and a drain D. For example, the array layer 5 includes a first conductive layer M1, a second conductive layer M2, and a third conductive layer M3 arranged in a direction away from the substrate 1. An insulating layer J is provided between adjacent conductive layers M. Exemplarily, the storage capacitor R includes a first plate R1 and a second plate R2. As an example, the gate G and the first plate R1 can be located in the first conductive layer M1, the second plate R2 can be located in the second conductive layer M2, and the source S and drain D can be located in the third conductive layer M3.

[0088] The second touch trace segments 42 are disposed in the same layer as at least one of the first conductive layer M1, the second conductive layer M2, and the third conductive layer M3. Specifically, the second touch trace segments 42 may be disposed in the same layer as one of the first conductive layer M1, the second conductive layer M2, and the third conductive layer M3. Alternatively, a portion of the second touch trace segments 42 may be disposed in the same layer as one of the first conductive layer M1, the second conductive layer M2, and the third conductive layer M3, while another portion of the second touch trace segments 42 may be disposed in the same layer as another layer of the first conductive layer M1, the second conductive layer M2, and the third conductive layer M3. There is no particular limitation on this.

[0089] Optionally, the display panel further includes a transition connection layer H arranged between the first touch routing segment 41 and the second touch routing segment 42, the first touch routing segment 41 is electrically connected to the transition connection layer H through the overlapping unit I, and the transition connection layer H is electrically connected to the second touch routing segment 42.

[0090] In this embodiment, the first touch trace segment 41 is first electrically connected to the transition connection layer H through the overlap unit I, and then the transition connection layer H is electrically connected to the second touch trace segment 42 through a via K or the like. The transition connection layer H can be provided on the same layer as a conductive layer M in the array layer 5, as long as the transition connection layer H is provided above the second touch trace segment 42.

[0091] Optionally, the transition connection layer H and the third conductive layer M3 are arranged on the same layer, the first touch routing segment 41 is electrically connected to the transition connection layer H through at least one overlapping unit I, the second touch routing segment 42 is arranged on the same layer as any one of the first conductive layer M1 and the second conductive layer M2, and the transition connection layer H is electrically connected to the second touch routing segment 42.

[0092] It can be understood that the third conductive layer M3 is arranged above the first conductive layer M1 and the second conductive layer M2. Therefore, the transition connection layer H can be arranged on the same layer as the third conductive layer M3 so that the transition connection layer H can connect the bonding unit I and the second touch wiring segment 42 respectively.

[0093] It should be noted that the normal overlapping portion I1 and the redundant overlapping portion I2 connected to the same first touch trace segment 41 can be connected to the same transition connection layer H. Alternatively, at least one of the normal overlapping portion I1 and the redundant overlapping portion I2 connected to the first touch trace segment 41 can be connected to a transition connection layer H, and the other normal overlapping portions I1 and the redundant overlapping portions I2 can be directly connected to the second touch trace segment 42.

[0094] In this embodiment, the normal overlap portion I1 and the redundant overlap portion I2 both include a via K and a conductive portion C located in the via K. The conductive portion C can be made of the same material as the first touch trace segment 41 or the second touch trace segment 42. Considering the preparation process, the conductive portion C can be made of the same material as the first touch trace segment 41.

[0095] Optionally, according to actual needs, the array layer 5 can also be provided with more conductive layers M. For example, the array layer 5 also includes a fourth conductive layer M4 arranged on the side of the third conductive layer M3 facing away from the substrate 1, and the transition connection layer H or the second touch trace segment 42 can be arranged on the same layer as the fourth conductive layer M4.

[0096] In some optional embodiments, along the first direction X, two adjacent second touch trace segments 42 are disposed on the same layer as different conductive layers M, and the first direction X is parallel to the direction of the plane where the substrate 1 is located.

[0097] It can be understood that by setting two adjacent second touch trace segments 42 in different layers, the setting space of the second touch trace segments 42 can be increased. According to actual needs, the line width of the second touch trace segment 42 can also be set larger to ensure that the impedance of the touch trace 4 of the display panel meets the requirements.

[0098] For example, one of the two adjacent second touch trace segments 42 can be provided on the same layer as the first conductive layer M1, and the other can be provided on the same layer as the second conductive layer M2. Of course, the second touch trace segment 42 can also be provided on the same layer as the third conductive layer M3 or other conductive layers M, without any special limitation.

[0099] In some optional embodiments, the display panel includes a display area AA and a non-display area NA, the non-display area NA includes overlapping areas TA arranged on both sides of the circuit board 3 along a first direction X, and the first direction X is parallel to the direction of the plane where the substrate 1 is located; the overlapping unit I is located in the overlapping area TA.

[0100] It should be noted that, compared to the prior art, in which the bonding unit I is located within the area on the side of the circuit board 3 facing the touch layer 2, this embodiment, in which the bonding unit I is located in the bonding area TA provided on both sides of the circuit board 3, provides more space for the bonding unit I, the first touch trace segment 41, and the second touch trace segment 42, effectively reducing the bezel width of the display panel and achieving a narrow bezel. Furthermore, the larger space for the bonding unit I facilitates the preparation and placement of the bonding unit I to connect the first touch trace segment 41 and the second touch trace segment 42, reducing the manufacturing complexity.

[0101] In some optional embodiments, the display panel further includes a signal line 8 , which is electrically connected to the circuit board 3 . In a direction perpendicular to the plane of the substrate 1 , the signal line 8 at least does not overlap with the first touch sensing trace segment 41 .

[0102] It should be noted that the signal line 8 is usually arranged in the area on the side of the circuit board 3 facing the touch layer 2 to connect to the circuit board 3. In this embodiment, the overlapping unit I is located in the overlapping area TA provided on both sides of the circuit board 3 to avoid large-area overlap between the first touch trace segment 41, the second touch trace segment 42 and the signal line 8, thereby avoiding the problem of signal interference between the touch signal line and the signal line 8.

[0103] Optionally, in a direction away from the substrate 1 , the display function layer 6 includes a first electrode layer 61 , a light-emitting layer 62 and a second electrode layer 63 , and the signal line 8 includes a voltage signal line electrically connected to the second electrode layer 63 .

[0104] It should be noted that the voltage signal lines electrically connected to the second electrode layer 63 typically need to transmit negative voltage signals to the second electrode layer 63, while the first and second touch trace segments 41, 42 need to transmit positive voltage signals. If the first and second touch trace segments 41, 42 overlap with the voltage signal lines, a potential difference will occur between the positive voltages of the first and second touch trace segments 41, 42 and the negative voltage of the voltage signal lines, thereby generating an electric field that affects the reliability of the display panel. Therefore, in this embodiment, by positioning the bonding unit I in the bonding area TA provided on both sides of the circuit board 3, at least the first touch trace segment 41 and the signal line 8 are kept away from each other, thereby preventing the signal line 8 from overlapping the first touch trace segment 41 and the first touch trace segment 41, thereby preventing the generation of an electric field between the two, and improving the reliability of the display panel.

[0105] Referring to FIG. 14 , an embodiment of the present invention further provides a method for manufacturing a display panel, comprising the following steps:

[0106] S110: providing a substrate 1, as shown in FIG15 ;

[0107] S120: Forming a touch layer 2 and touch traces 4 on one side of the substrate 1, wherein the touch layer 2 includes touch electrodes 20, and the touch traces 4 include first touch trace segments 41 and second touch trace segments 42 of different layers, wherein the first touch trace segments 41 are electrically connected to the touch electrodes 20, and the first touch trace segments 41 are electrically connected to the same second touch trace segments 42 via at least two overlapping portions L, as shown in FIG3;

[0108] S130 : providing a circuit board 3 , and disposing the circuit board 3 and the touch layer 2 adjacent to each other in a direction parallel to the plane of the substrate 1 , and electrically connecting the second touch trace segment 42 to the circuit board 3 , as shown in FIG2 .

[0109] In the display panel manufacturing method provided in an embodiment of the present invention, since the first touch trace segment 41 and the second touch trace segment 42 are located on different layers, an overlapping portion L is provided to connect the first touch trace segment 41 and the second touch trace segment 42. In this embodiment, a single first touch trace segment 41 is electrically connected to the same second touch trace segment 42 via at least two overlapping portions L. By setting the number of overlapping portions L to at least two, a redundant design is implemented. This ensures that if problems such as misalignment occur between the first touch trace segment 41 and the second touch trace segment 42, the first touch trace segment 41 and the second touch trace segment 42 can be connected via at least one overlapping portion L, ensuring that at least one overlapping portion L can function properly, reducing process requirements and improving the production yield and performance of the display panel.

[0110] In step S110, substrate 1 can be formed through coating, curing, film formation, and other processes. Substrate 1 can be a rigid substrate, such as a glass substrate, or a flexible substrate made of polyimide, polystyrene, polyethylene terephthalate, polyparaxylene, polyethersulfone, or polyethylene naphthalate. Substrate 1 primarily supports the components disposed thereon.

[0111] In step S120, when a portion of the touch traces 4 is provided on the same layer as the touch layer 2, the touch layer 2 and the portion of the touch traces 4 can be formed together using the same process, and the touch electrodes 20 of the touch layer 2 and the portion of the touch traces 4 can be formed separately through patterning. For example, the first touch trace segment 41 can be provided on the same layer as the touch electrode 20 of the touch layer 2.

[0112] When the second touch trace segment 42 and the conductive layer M in the array layer 5 are arranged on the same layer, the array layer 5 can be first formed on the substrate 1. The array layer 5 includes at least two conductive layers M. The second touch trace segment 42 and the at least one conductive layer M are formed together through the same process. Then, the touch layer 2, the first touch trace segment 41 and the overlapping portion L are formed on the side of the array layer 5 facing away from the substrate 1.

[0113] In step S130 , the circuit board 3 may be a Flexible Printed Circuit (FPC). Of course, other types of circuit boards 3 may also be used as long as they can meet the requirements of the display panel.

[0114] In some optional embodiments, the step of forming the touch layer 2 and the touch trace 4 on one side of the substrate 1 includes: forming a second touch trace segment 42 on one side of the substrate 1; forming an insulating layer J on the side of the second touch trace segment 42 facing away from the substrate 1; forming a via K and a conductive portion C in the via K in the insulating layer J, and the overlapping portion L includes the via K and the conductive portion C in the via K; forming a first touch trace segment 41 on the side of the insulating layer J facing away from the substrate 1, the first touch trace segment 41 is electrically connected to the second touch trace segment 42 through the conductive portion C in the via K, and the first touch trace segment 41 and the second touch trace segment 42 constitute the touch trace 4.

[0115] In this embodiment, the second touch trace segment 42 can be formed together with at least one conductive layer M in the array layer 5 through the same process, using a patterning process such as a photolithography process to form the second touch trace segment 42. Subsequently, a full layer of conductive material can be formed on the side of the insulating layer J facing away from the substrate 1, and the via K can also be filled with the conductive material to form a conductive portion C. The entire layer of conductive material is then patterned, and portions of the conductive material can be removed using etching or other methods to form the desired first touch trace segment 41.

[0116] The insulating layer J may include an inorganic material or an organic material. For example, the insulating layer J may include an inorganic layer including at least one of silicon nitride, silicon oxide, or silicon oxynitride. Alternatively, the insulating layer J may include a planarization layer P including an organic material. Optionally, the material of the planarization layer P may include hexamethyldisiloxane, epoxy resin, or PI (polyimide).

[0117] An embodiment of the present invention further provides a display device, comprising the display panel in any of the above embodiments.

[0118] The display panel in the display device provided by an embodiment of the present invention includes a substrate 1, a touch layer 2, a circuit board 3, and a touch trace 4. Because a first touch trace segment 41 and a second touch trace segment 42 are located on different layers, an overlapping portion L is provided to connect the first touch trace segment 41 and the second touch trace segment 42. In this embodiment, the first touch trace segment 41 is electrically connected to the same second touch trace segment 42 via at least two overlapping portions L. By setting the number of overlapping portions L to at least two, a redundant design is implemented. This ensures that if problems such as misalignment occur between the first touch trace segment 41 and the second touch trace segment 42, the first touch trace segment 41 and the second touch trace segment 42 can be connected via at least one overlapping portion L, ensuring that at least one overlapping portion L can function properly, reducing process requirements and improving the production yield and performance of the display device.

[0119] The display device provided by the embodiment of the present invention has the technical effects of the technical solution of the display panel in any of the above embodiments, and the explanations of the structures and terms that are the same as or corresponding to the above embodiments are not repeated here.

[0120] The display device provided in the embodiment of the present invention may be an organic light-emitting diode (OLED) display device, a quantum dot light-emitting diode (QLED) display device, or a micro flat panel display device (Micro-OLED or Micro-LED).

[0121] The display device provided in the embodiment of the present application can be applied to a mobile phone, or any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc. The embodiment of the present application does not specifically limit this.

[0122] The above is only a specific implementation method of the present application. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the scope of protection of the present application is not limited to this. Any technician familiar with this technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the scope of protection of this application.

[0123] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps. In other words, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

Claims

1. A display panel, comprising: substrate; A touch layer is provided on one side of the substrate, and the touch layer includes touch electrodes; A circuit board, wherein the circuit board and the touch layer are adjacently arranged in a direction parallel to the plane where the substrate is located; A touch trace, the touch trace comprising a first touch trace segment and a second touch trace segment on different layers, the first touch trace segment being electrically connected to the touch electrode; the second touch trace segment being electrically connected to the circuit board, the first touch trace segment being electrically connected to the same second touch trace segment via at least two overlapping portions.

2. The display panel according to claim 1, wherein: The display panel further includes an array layer, a display function layer, and a packaging layer stacked on the substrate. The touch layer and the first touch trace segment are both arranged on a side of the packaging layer away from the substrate.

3. The display panel according to claim 2, wherein: The array layer includes at least two conductive layers, and the second touch trace segment is provided on the same layer as at least one of the conductive layers. Alternatively, the array layer includes a first conductive layer, a second conductive layer and a third conductive layer arranged in a direction away from the substrate, and the second touch trace segment is arranged on the same layer as at least one of the first conductive layer, the second conductive layer and the third conductive layer.

4. The display panel according to claim 3, wherein, The display panel further includes a transition connection layer provided between the first touch trace segment and the second touch trace segment, the first touch trace segment is electrically connected to the transition connection layer via the overlap portion, and the transition connection layer is electrically connected to the second touch trace segment.

5. The display panel according to claim 4, wherein, The transition connection layer and the third conductive layer are arranged on the same layer, the first touch trace segment is electrically connected to the transition connection layer through at least one overlapping portion, the second touch trace segment is arranged on the same layer as either the first conductive layer or the second conductive layer, and the transition connection layer is electrically connected to the second touch trace segment.

6. The display panel according to claim 1, wherein, The overlapping portion includes a via hole and a conductive portion located in the via hole.

7. The display panel according to claim 3, wherein, Along a first direction, two adjacent second touch trace segments are arranged on the same layer as different conductive layers, and the first direction is parallel to the direction of the plane where the substrate is located.

8. The display panel according to claim 7, wherein, Along the first direction, two second touch wiring segments are arranged in the same layer with one second touch wiring segment in between.

9. The display panel according to claim 1, wherein, The touch layer includes a first touch conductive layer and a second touch conductive layer stacked in a direction away from the substrate, the touch electrodes include a first touch electrode block and a second touch electrode block arranged in the same layer and insulated from each other, and the touch electrodes are arranged in the same layer as either the first touch conductive layer or the second touch conductive layer; The touch traces include a first touch signal line electrically connected to the first touch electrode block and a second touch signal line electrically connected to the second touch electrode block. The touch traces are provided on the same layer as at least one of the first touch conductive layer and the second touch conductive layer.

10. The display panel according to claim 9, wherein, The first touch signal line and the second touch signal line are located in different layers, Alternatively, the first touch conductive layer includes a bridge portion, the bridge portion is used to electrically connect adjacent first touch electrode blocks, and the touch electrodes and the second touch conductive layer are provided in the same layer.

11. The display panel according to claim 1, wherein: The display panel includes a display area and a non-display area. The non-display area includes overlapping areas disposed on both sides of the circuit board along a first direction, and the first direction is parallel to the plane where the substrate is located; the overlapping portion is located in the overlapping area.

12. The display panel according to claim 11, wherein, The second touch trace segment includes a first portion extending along a second direction. The first portion is electrically connected to the first touch trace segment through the overlapping portion, and the second direction intersects the first direction; the first portion is disposed on a side of the overlapping portion facing the first touch trace segment.

13. The display panel according to claim 11, wherein, The display panel further includes a signal line, and the signal line is electrically connected to the circuit board. In a direction perpendicular to the plane where the substrate is located, the signal line and the first touch trace segment do not overlap. In a direction away from the substrate, the display functional layer includes a first electrode layer, a light-emitting layer, and a second electrode layer, and the signal line includes a voltage signal line electrically connected to the second electrode layer.

14. A display panel, wherein, Comprising: A substrate; A touch layer disposed on one side of the substrate, and the touch layer includes touch electrodes; A circuit board, and the circuit board and the touch layer are adjacently arranged along a direction parallel to the plane where the substrate is located; Touch traces, and the touch traces include first touch trace segments and second touch trace segments of different layers. The first touch trace segments are electrically connected to the touch electrodes, and the second touch trace segments are electrically connected to the circuit board; An overlapping unit, and the overlapping unit includes a normal overlapping portion and a redundant overlapping portion. The first touch trace segment is electrically connected to the second touch trace segment through the normal overlapping portion and / or the redundant overlapping portion.

15. The display panel according to claim 14, wherein, The cross-sectional width of the normal overlapping portion is not less than the cross-sectional width of the redundant overlapping portion. Or, the cross-sectional width of the normal overlapping portion is the same as the cross-sectional width of the redundant overlapping portion. Or, the overlapping unit includes at least one normal overlapping portion and a plurality of redundant overlapping portions, and the number of redundant overlapping portions is greater than or equal to the number of normal overlapping portions. Or, the normal overlapping portions and the redundant overlapping portions are arranged at equal intervals. Or, the display panel further includes an array layer, a display functional layer, and a packaging layer stacked on the substrate. The touch layer and the first touch trace segments are both disposed on a side of the packaging layer away from the substrate.

16. The display panel according to claim 15, wherein, The array layer includes at least two conductive layers, and the second touch trace segment is disposed on the same layer as at least one of the conductive layers. Or, the array layer includes a first conductive layer, a second conductive layer, and a third conductive layer arranged in a direction away from the substrate, and the second touch trace segment is disposed on the same layer as at least one of the first conductive layer, the second conductive layer, and the third conductive layer. Or, a transition connection layer is further disposed between the first touch trace segment and the second touch trace segment. The first touch trace segment is electrically connected to the transition connection layer through the overlapping unit, and the transition connection layer is electrically connected to the second touch trace segment.

17. The display panel according to claim 16, wherein, The transition connection layer and the third conductive layer are provided on the same layer. The first touch trace segment is electrically connected to the transition connection layer through at least one of the overlapping units. The second touch trace segment is provided on the same layer as any one of the first conductive layer and the second conductive layer. The transition connection layer is electrically connected to the second touch trace segment.

18. The display panel according to claim 17, wherein: Both the normal overlapping portion and the redundant overlapping portion include vias and conductive portions located within the vias. Alternatively, the display panel includes a display area and a non-display area. The non-display area includes overlapping areas provided on both sides of the circuit board along a first direction, and the first direction is parallel to the plane where the substrate is located; the overlapping unit is located in the overlapping area.

19. The display panel according to claim 17, wherein, The display panel further includes signal lines, and the signal lines are electrically connected to the circuit board. In a direction perpendicular to the plane where the substrate is located, the signal lines do not overlap with the first touch trace segment. In a direction away from the substrate, the display functional layer includes a first electrode layer, a light-emitting layer, and a second electrode layer. The signal lines include voltage signal lines electrically connected to the second electrode layer.

20. A display device, wherein, A display panel according to any one of claims 1 to 19.

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